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/* Machine-dependent details of interruptible RPC messaging. Alpha version.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \
({ \
error_t err; \
asm (".globl _hurd_intr_rpc_msg_do_trap\n" \
".globl _hurd_intr_rpc_msg_in_trap\n" \
" mov %1, $16\n" \
" mov %2, $17\n" \
" mov %3, $18\n" \
" mov %4, $19\n" \
" mov %5, $20\n" \
" mov %6, $21\n" \
" mov %7, $1\n" \
" lda $0, -25\n" \
"_hurd_intr_rpc_msg_do_trap: callsys\n" \
"_hurd_intr_rpc_msg_in_trap: ret\n" \
: "=r" (err) \
: "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \
"r" (rcv_name), "r" (timeout), "r" (notify) \
: "16", "17", "18", "19", "20", "21", "1", "0"); \
err; \
})
static void inline
INTR_MSG_BACK_OUT (struct alpha_thread_state *state)
{
return;
}
#include "hurdfault.h"
/* This cannot be an inline function because it calls setjmp. */
#define SYSCALL_EXAMINE(state, callno) \
({ \
u_int32_t *p = (void *) ((state)->pc - 4); \
int result; \
_hurdsig_catch_memory_fault (p) ? 0 : \
({ \
result = (*p == 0x00000083); \
_hurdsig_end_catch_fault (); \
if (result) \
/* The PC is just after a `callsys' instruction. \
This is a system call in progress; v0 holds the call number. */ \
*(callno) = (state)->r0; \
result; \
}); \
})
struct mach_msg_trap_args
{
/* This is the order of arguments to mach_msg_trap. */
mach_msg_header_t *msg;
mach_msg_option_t option;
mach_msg_size_t send_size;
mach_msg_size_t rcv_size;
mach_port_t rcv_name;
mach_msg_timeout_t timeout;
mach_port_t notify;
};
/* This cannot be an inline function because it calls setjmp. */
#define MSG_EXAMINE(state, msgid, rcv_name, send_name, option, timeout) \
({ \
mach_msg_header_t *msg = (mach_msg_header_t *) (state)->r16; \
*(option) = (mach_msg_option_t) (state)->r17; \
*(rcv_name) = (mach_port_t) (state)->r18; \
*(timeout) = (mach_msg_timeout_t) (state)->r19; \
(msg == 0) ? \
({ \
*(send_name) = MACH_PORT_NULL; \
*(msgid) = 0; \
0; \
}) : \
(_hurdsig_catch_memory_fault (msg) ? -1 : \
({ \
*(send_name) = msg->msgh_remote_port; \
*(msgid) = msg->msgh_id; \
_hurdsig_end_catch_fault (); \
0; \
}) \
); \
})
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